I noticed while working on
4986239: DeflaterOutputStream is memory inefficient
that this code

     private byte[] deflate(String s) throws IOException {
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         DeflaterOutputStream dos = new DeflaterOutputStream(baos);

         int len = s.length();
         for (int i = 0; i < len; i++) {
             dos.write((int)s.charAt(i));
         }
         dos.close();

         return baos.toByteArray();
     }

might be quite inefficient (in analagous code, I measured a 20-fold speedup).
It is likely that passing the data as a
block would be an order of magnitude more efficient.

In Java, it is the user's responsibility to buffer data when writing to
an expensive stream like FileOutputStream or DeflaterOutputStream.

Either a block could be writting at a time, or the DeflaterOutputStream
could be wrapped with a BufferedOutputStream.

I haven't tested the suggested fix; I don't know how to use these classes.

###@###.### 2004-02-01